Sökning: "Carbon fluxes"

Visar resultat 36 - 40 av 172 avhandlingar innehållade orden Carbon fluxes.

  1. 36. Impacts and drivers of insect herbivory on element cycling in forests globally

    Författare :Bernice Hwang; MERGE: ModElling the Regional and Global Earth system; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biogeochemical cycling; folivory; insect cadavers; insect frass; insect herbivory; litter decomposition; nutrient cycling; carbon; nitrogen; phosphorus; silicon; silica;

    Sammanfattning : The effects of insect herbivores on forest functioning are not well understood even though they can have important impacts on ecosystem processes by intercepting foliage before resorption and depositing nutrient-rich materials to the soil. In this thesis, I investigated the impact and drivers of insect folivores on carbon (C), nitrogen (N), phosphorus (P) and silica (Si) cycling in broadleaf forests, and how this varies with major climate variables. LÄS MER

  3. 37. The Torneträsk System - A basis for predicting future subarctic ecosystems

    Författare :Didac Pascual; BECC: Biodiversity and Ecosystem services in a Changing Climate; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; climate change; carbon fluxes; ecosystem change; climate projections; rain on snow; modelling; impacts; snow; permafrost; winter warming events;

    Sammanfattning : Arctic and subarctic areas have experienced a rapid warming and substantial increases in precipitation in recent decades. The frequency and intensity of some extreme events, such as fires, winter warming events, extreme rainfall, and droughts, has also increased. LÄS MER

  4. 38. Growth and microstructure of reactive sputter deposited boron nitride : carbon (BN:C) thin films

    Författare :Mats P. Johansson; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Growth, microstructure and mechanical properties of boron nitride: carbon (BN:C) have been studied in films prepared by reactive r.f. diode sputter deposition as well as by reactive unbalanced d.c. LÄS MER

  5. 39. Quantifying the impact of winter warming on the Arctic carbon cycle

    Författare :Alexandra Pongrácz; BECC: Biodiversity and Ecosystem services in a Changing Climate; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arctic; snow; permafrost; LPJ-GUESS; non-growing season; carbon cycling; LPJ-GUESS; Arctic; permafrost; snow; carbon cycling; non-growing season;

    Sammanfattning : The Arctic has undergone extreme changes during the last decades and is warming over twice the global average. There has been increasing interest in understanding how warming and changes in snow and rainfall will affect high-latitude ecosystems. LÄS MER

  7. 40. Carbon Dioxide Fluxes, Measurement Techniques and Variability over the Baltic Sea

    Författare :Maria Norman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER